2006. California Invasive Plant Inventory - Cal-IPC

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TABLE 1: Invasive Non-Native Plants that Threaten Wildlands in California (continued) Scientific Name Common Name Rating Ecological Types Invaded and Other Comments Regions Invaded Alert ◆ Impacts Invasiveness Distribution Doc. Level ◆ Retama monosperma bridal broom Moderate B B C 1.8 Coastal scrub. Can spread rapidly but largely if uncontrolled. Limited distribution in CA. Ricinus communis castorbean Limited C B B 2.5 Coastal scrub and prairie, riparian areas. Widespread in southern CA. Impacts locally variable. SW GV, CW, SW Robinia pseudoacacia black locust Limited C B B 2.8 Riparian areas, canyons. Severe impacts in southern states. Impacts minor in CA. CA-FP, GB Rubus armeniacus (= R. discolor) Himalaya blackberry Rumex acetosella red sorrel, sheep sorrel High A A A 3.0 Riparian areas, marshes, oak woodlands CA-FP Moderate B B A 2.3 Many habitats, riparian areas, forest, wetlands. Widespread. Abiotic impacts unknown. Impacts can vary locally. CA-FP Rumex crispus curly dock Limited C C A 2.7 Grasslands, vernal pool, meadows, riparian. Widespread. Impacts appear to be minor. CA Salsola paulsenii barbwire Russian-thistle Limited C C C 2.9 Desert and Great Basin scrub. Limited distribution. Impacts in desert appear to be minor. SW, SNE, DMoj Salsola tragus (=S. kali) Russian-thistle Limited C B B 2.8 Desert dunes and scrub, alkali playa. Widespread. Impacts minor in wildlands. CA Salvia aethiopis Mediterranean sage Limited C B B 2.5 Sagebrush, juniper, bunchgrass. Limited distribution. Impacts minor but can be locally higher. MP ◆ Salvinia molesta giant salvinia High A A C 2.9 Freshwater aquatic systems CW, DSon ◆ Sapium sebiferum (=Triadica sebifera) Chinese tallowtree Moderate B B C 3.2 Riparian areas. Impacts severe in southeast US. Limited distribution, but spreading rapidly regionally. GV Saponaria officinalis bouncingbet Limited C B C 2.5 Riparian scrub and woodland. Impacts unknown or minor, but appear to be locally variable. NW, GV, CW, SW, GB Schinus molle Peruvian peppertree Limited C B B 2.5 Riparian. Limited distribution. Impacts largely unknown in CA. GV, SN, CW, SW Schinus terebinthifolius Brazilian peppertree Limited C B C 2.6 Riparian. Very invasive in tropics. Abiotic impacts unknown, but appear significant locally. SW Scientific names based on The Jepson Manual. For each species, the first common name is based on the Weed Science Society of America’s “Composite List of Weeds” (www.wssa. net), followed by other names used in California. Scores: A = Severe, B = Moderate, C = Limited, D = None, U = Unknown. Documentation level averaged. Regions invaded based on Jepson geographic regions. Plant assessment forms, literature citations, and full rating criteria available at www.cal-ipc.org. CALIFORNIA INVASIVE PLANT INVENTORY | 17
TABLE 1: Invasive Non-Native Plants that Threaten Wildlands in California (continued) Scientific Name Common Name Rating Ecological Types Invaded and Other Comments Regions Invaded Alert ◆ Impacts Invasiveness Distribution Doc. Level Schismus arabicus, S. barbatus mediterraneangrass Limited B C A 2.3 Scrub, thorn woodland. Widespread in deserts. Impacts can be more important locally. GV, CW, SW, D Senecio jacobaea tansy ragwort Limited C B B 2.8 Grasslands, riparian. Impacts generally minor. Can be locally important in NW CA. CA-FP ◆ Sesbania punicea red sesbania, scarlet wisteria High A B C 3.2 Riparian areas GV Silybum marianum blessed milkthistle Limited C C A 3.5 Grasslands, riparian. Widespread, primarily in disturbed areas. Impacts can be higher locally NW, GV, CW, SW Sinapis arvensis wild mustard, charlock Limited C C C 2.9 Grasslands. Primarily in disturbed sites. Impacts minor or unknown in wildlands. CA-FP Sisymbrium irio London rocket Moderate B B A 1.9 Scrub, grasslands. Widespread. Primarily in disturbed sites. Impacts vary locally. GV, SW ◆ Spartina alterniflora (and S. alterniflora x foliosa hybrids) smooth cordgrass & hybrids, Atlantic cordgrass High A A C 3.5 San Francisco Bay salt marshes and mudflats. Hybridizes with native S. foliosa. CW ◆ Spartina anglica common cordgrass Moderate B B D 3.4 San Francisco Bay salt marshes. Very severe impact in other countries. Limited distribution in CA. CW ◆ Spartina densiflora dense-flowered cordgrass High A B C 3.3 San Francisco and Humboldt Bay salt marshes NW, CW Spartina patens saltmeadow cordgrass Limited C C D 2.9 San Francisco Bay salt marshes. Very limited distribution. Impacts currently minor in CA, but high in other countries. CW Spartium junceum Spanish broom High A B B 3.2 Coastal scrub, grasslands, wetlands, oak woodland, forests NW, CW, SW ◆ Stipa capensis Mediterranean steppegrass, twisted-awned speargrass Moderate B B D 1.9 Desert scrub. First recorded in CA 1995. Limited distribution, but spreading rapidly in CA deserts. DSon Taeniatherum caput-medusae medusahead High A A A 3.4 Grasslands, scrub, woodland CaR, NW, SN, GV, SW Scientific names based on The Jepson Manual. For each species, the first common name is based on the Weed Science Society of America’s “Composite List of Weeds” (www.wssa. net), followed by other names used in California. Scores: A = Severe, B = Moderate, C = Limited, D = None, U = Unknown. Documentation level averaged. Regions invaded based on Jepson geographic regions. Plant assessment forms, literature citations, and full rating criteria available at www.cal-ipc.org. 18 | CALIFORNIA INVASIVE PLANT INVENTORY
Page 1 and 2: California Invasive Plant Council P
Page 3 and 4: INVENTORY REVIEW COMMITTEE Dr. Carl
Page 6 and 7: Introduction Invasive plants damage
Page 8 and 9: edu) so that ratings could be appli
Page 10 and 11: inventory does not attempt to sugge
Page 12 and 13: TABLE 1: Invasive Non-Native Plants
Page 26 and 27: TABLE 3: Species Evaluated But Not
Page 28 and 29: TABLE 4: Species Nominated but Not
Page 30 and 31: APPENDIX 1: Species Listed by Categ
Page 32 and 33: APPENDIX 2. Cal-IPC Species Listed
Page 34 and 35: APPENDIX 2: Cal-IPC Species Listed
Page 36 and 37: APPENDIX 2: Cal-IPC Species Listed
Page 38 and 39: APPENDIX 3. Examples of Ecological
Page 40 and 41: APPENDIX 4. Species by Common Name
Page 42 and 43: APPENDIX 4: Species by Common Name
Page 44: California Invasive Plant Council 2

2006. California Invasive Plant Inventory - Cal-IPC

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